/*
 * Copyright 2011 The Rusted Roof, LLC.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package org.proteusframework.platformservice.persistence.c14n;

import java.io.*;
import java.util.ArrayList;
import java.util.List;

/**
 * @author Tacoma Four
 */
final class DoubleArrayC14NHandler extends AbstractC14NHandler
{
    @Override
    public Object fromC14N(byte[] bytes)
    {
        int idx = 0;
        List<Double> doubleList = new ArrayList<Double>();
        DataInputStream doubleDis = new DataInputStream(new ByteArrayInputStream(bytes));

        try
        {
            while (true)
            {
                doubleList.add(doubleDis.readDouble());
            }
        } catch (EOFException ignore)
        {

        } catch (IOException e)
        {
            e.printStackTrace();
        }

        double[] doubleValues = new double[doubleList.size()];
        for (Double curValue : doubleList)
        {
            doubleValues[idx] = curValue;
            idx++;
        }

        return doubleValues;

    }

    @Override
    public byte[] toC14N(Object object)
    {
        byte[] doubleBytes = new byte[0];

        double[] doubleValues = (double[]) object;
        ByteArrayOutputStream doubleBaos = new ByteArrayOutputStream();
        DataOutputStream doubleDos = new DataOutputStream(doubleBaos);

        String doubleHeader = PACKED_BLOB_PREFIX + transposeClassName(double[].class.getName()) + PACKED_BLOB_SUFFIX;
        byte[] doubleHeaderBytes = doubleHeader.getBytes();
        try
        {
            doubleDos.write(doubleHeaderBytes, 0, doubleHeaderBytes.length);
            for (double curValue : doubleValues)
            {
                doubleDos.writeDouble(curValue);
            }

            doubleDos.flush();
            doubleDos.close();
            doubleBytes = doubleBaos.toByteArray();
        } catch (IOException e)
        {
            e.printStackTrace();
        }

        return doubleBytes;
    }
}
